Soundcore is Anker’s audio brand, our signature sound is loved by 10 million+ people around the world Hi-Res Certified Sound: The Hi-Res logo is a guarantee of exceptional audio quality, awarded to audio devices capable of producing a highly accurate representation of what the artist intended to be heard. Unlike ordinary headphones, R50i delivers sound up to 40 kHz for the richest listening experience. BassUp: Our exclusive BassUp technology analyzes your audio’s low frequencies in real-time and instantly increases the bass. Combined with oversized 40mm dynamic drivers, bass power is boosted up to 100%. A button on the right earcup of the wireless over ear headphones activates BassUp 60-Hour Playtime*: An advanced Bluetooth chip with reduced power draw combines with Anker’s world-renowned power technology to offer enormous playtime, even for wireless over ear headphones. Listen for 2 hours a day for an entire month Fast-Charging: In a rush? Charge R50i wireless over ear headphones for 5 minutes and listen for up to 5 hours. With a USB-C charging port for charging convenience and expanded compatibility